VRSF N55 4 inch Sports Cat Downpipe for BMW F Series M135i, M235i, M2, 335i, 435i
Unlock power, response and sound with the VRSF N55 4 inch Sports Cat. This high flow 200 cell catted downpipe is a proven upgrade for the BMW N55 engine across the F20 F21 F22 F30 F32 F33 F87 platforms including M135i, M235i, M2, 335i, 435i. If you are searching for a BMW N55 sports cat, VRSF N55 downpipe, catted downpipe or 4 inch N55 downpipe, this is the performance part that delivers.
Back pressure is significantly reduced compared to the restrictive factory catalytic converter. The result is faster turbo spool, an increase in power and torque, and a deeper, more aggressive exhaust note. With a suitable tune, customers typically see gains of 20 to 25 hp, alongside sharper throttle response and improved drivability. We have installed and used these on N55 builds and feedback from our customers has been excellent, with great fitment and consistent performance.
Why choose the VRSF N55 4 inch Sports Cat
- High flow 200 cell catalyst for performance with excellent flow
- 4.0 inch design for maximum exhaust gas flow and faster spool
- 304 stainless steel construction, TIG welded, mandrel bent for strength and flow
- CNC machined SS304 flanges for precise OEM style fitment
- 20 to 25 hp gains with tune, improved torque and response
- VRSF Lifetime Warranty on the downpipe
Also available from VRSF in catless configuration and in 3.5 inch size depending on vehicle build date. This listing is for the 4 inch sports cat.
Ceramic coating option
We offer Cerakote high temperature ceramic coating, made to withstand temperatures up to 1800°F. This thermal barrier helps keep heat inside the exhaust, reducing engine bay temperatures which can assist with intake air temperature and overall thermal management. Please note the downpipe carries a lifetime warranty, while ceramic coating and catted versions carry a 1 year warranty.
Fitment and model guide
Use this as a guide to determine whether your BMW requires the 4 inch version. If in doubt, email the last 7 of your VIN to Sales@nforcd.com and we will confirm fitment.
- 2012 to 2018 F30 BMW 335i and 335xi N55
- 2013 to 2018 F32 and F33 BMW 435i and 435xi N55
- 2012 to 2018 F20 and F21 BMW M135i and M135xi N55
- 2013 to 2018 F22 BMW M235i and M235xi N55
- 2015 to 2019 F87 BMW M2 N55
Version notes: M135i and 335i built up to 07/2013 require the 3.5 inch version. M135i and 335i built after 07/2013 require the 4 inch version. All M235i and 435i models require the 4 inch version.
Key search terms
VRSF N55 downpipe, BMW N55 sports cat, N55 4 inch downpipe, VRSF catted downpipe, BMW F series M135i downpipe, M235i sports cat, F30 335i downpipe, F32 435i downpipe, F87 M2 N55 downpipe, 200 cell high flow catalytic converter, stainless steel N55 downpipe, UK BMW tuning parts, performance exhaust upgrade.
Installation and support
Direct bolt on fitment. For professional fitting, choose Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.